The Bile Duct (and Pancreas) and the Physician

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Malcolm Dalton
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1 The Bile Duct (and Pancreas) and the Physician Javaid Iqbal Consultant in Gastroenterology and Pancreato-biliary Medicine University Hospital South Manchester

2 Not so common?! Two weeks 38 ERCP s Physician Surgeon 5 0 Cholangitisstones Pancreatitis Cancer - Jaundice

3 Goals Introduction Assess severity and role of imaging Feeding modality Antibiotics When to intervene

4 Acute Biliary Pancreatitis Gallstones commonest cause worldwide Variable severity of presentation 10-20% life-threatening course 8-10% mortality Death associated with pancreatitis associated complications 2 phases (early <7 days, late >2 weeks)

5 Severe ABP ABP + organ failure and/or ABP + local complications APACHE II =/> 8 Ranson Criteria =/> 3 Low threshold for managing on HDU Crit Care Med 1999

6 APACHE II

7 Biliary 35-40% Alcohol 30% Metabolic Drugs Toxins Autoimune Causes Trauma Ischaemia Infection Genetic Idiopathic

8 Inflammatory cascade Acute Pancreatitis Capillary Leak ARDS Shock ATN Hypovolaemia

9 Curr Med Chem 2006

11 Initial Ix Amylase - >3x ULN (if normal Creat) Lipase TG s Ca LFT s ALT/AST, ALKP, Bili Transaminases >3x ULN, 95% likelihood ABP CRP - >150 at 48 hours prognostication but more useful for its high NPV 86% Gastroenterology 2007

12 Q: 56 year old; Amylase 2500, ALT 330, WCC 16.5, Glucose 21, po2 7.4kpa. 1. Admit, USS, O2, antibiotics, glucose control 2. Admit, CT scan contrast, O2, glucose control, hydration 3. HDU admission, USS, O2, IV fluids, glucose control 4. HDU admission, O2, IV fluids, glucose control, antibiotics

13 Q: 56 year old; Amylase 2500, ALT 330, WCC 16.5, Glucose 21, po2 7.4kpa. 1. Admit, USS, O2, antibiotics, glucose control 2. Admit, CT scan contrast, O2, glucose control, hydration 3. HDU admission, USS, O2, IV fluids, glucose control 4. HDU admission, O2, IV fluids, glucose control, antibiotics

14 Ranson s Criteria PPV 49% NPV 91% Surg Gynaec Obstet 1974

15 CT scan To assess for severity and pancreatic necrosis Avoid in first 72 hours Lack of improvement in 72 hours Persistent fever in clinically severe ABP Acute deterioration after clinical improvement Diagnosis in doubt

16 TAUSS

17 MRCP

18 MRCP

19 EUS Scope Electronic scanning Frequency: 5, 6, 7.5 and 10MHz Doppler facility ERCP was gold standard for ductal stones EUS sensitivity 89-94% specificity 95%

22 Management issues Elderly Obesity Can it influence the course of the disease? Pancreatology 2006

23 Hydration Cornerstone of medical therapy Stabilise capillary permeability Replace intravascular volume Maintains gut barrier function Can reduce pancreatic necrosis Which fluid? Crystalloid vs Colloid

24 Hydration Fluid resuscitation Aggressive 15ml/kg/hr vs Non-aggressive 5-10 ml/kg/hr Other regimes: 20mg/hr bolus then 3mg/kg/hr mls/hour for 48 hrs Equal number of studies favouring either approach

25 (Urgent) ERCP in ABP Severe ABP AND obstructive jaundice +/- Cholangitis YES Severe ABP AND CBD stones and not Jaundiced PROBABLY NOT Severe ABP AND no CBD stones and not jaundiced DEFINITELY NOT

26 Antibiotic Prophylaxis World Jour Gastro 2012 DO NOT ROUTINELY USE ANTIBIOTICS OR ANTIFUNGAL AGENTS IN NECROTISING PANCREATITIS Crit Care Med 2004

27 Potential role? Probiotics 298 pts with predicted severe pancreatitis multispecies probiotic (153) vs placebo (145) Combined infection endpoint Infections 30% in probiotic vs 28% in placebo 24 (16%) probiotics died vs 9 (6%) RR in probiotics developed bowel ischaemia vs 0 in placebo Lancet 2008

28 Nutrition Most patients with ABP will resolve in a few days and so no additional nutritional support needed. Pancreatic rest no longer accepted How soon to start feeding? TPN vs EN?

29 Dig Surg pt trial MOF Lower EN (20% vs 50%, p=0.02) Infected Necrosis and Surgery Lower in EN (20 vs 74%, p <0.001) Lower in EN (25% vs 88%, p<0.001) Mortality Lower in EN (6% vs 35 %, p<0.001)

30 Necrosis Sterile vs Infected Timing of intervention Type of intervention Surgical Percutaneous Endoscopic

31 Conclusion Recognise at risk patients for severe disease and use of imaging Provide aggressive monitoring and resuscitation Evidence-base does NOT support antibiotic prophlaxis Urgent ERCP in ABP with jaundice +/- cholangitis

32 Conclusion cont d No role for urgent ERCP in ABP without jaundice Establish early enteral feeding Historical surgical necrosectomy rare, with less invasive methods of treating necrosis step up approach

33 ACUTE CHOLANGITIS

34 Highlights Pathogenesis Microbiology Clinical features Lab findings Imaging Management

35 Highlights Cholangitis Potentially life threatening obstruction and infection of the biliary tree Charcoats triad Pain, Rigors, Jaundice 80% + from choledochlithiasis Rest strictures benign/malignant

36 Immediate Highlights Fluid resusucutation Broad Spectrum Antibiotics cover Correction of Coagulopathy Biliary Drainage

37 Pathogenesis Partial or Complete obstruction of the biliary tree Hallmark is raised intraductal biliary pressures Defence mechanisms overwhelmed Duodenum Portal venous system Infected gallbladder Periductal lymphatics

38 Microbiology 80%+ will have positive B/C Mostly Enteric bacteria E coli, Enterococcus, Enterobacter Polymicrobial bacteria Surgery or instrumentation

39 Clinical Features Charcoat triad (20-50%) Reynold Pentad (Hypotension/low GCS) Jaundice only 60-70% High index of suspicion Elderly Surgery/instr

40 CRP/WCC Lab findings/imaging LFT s may not necessarily be cholestatic. ALT/AST >250 is a good discriminator of gallstone aetiology. Relatively normal ALT/AST often indicates malignant aetiology Blood culture USS, CT, MRCP, EUS

41 Imaging USS biliary dilation, stones CT Malignancy / Staging / biliary dilation MRCP Stones, hilar stricture (after a CT), intra-hepatic stones EUS Never first line investigation

42 CT scan

43 MRCP

44 EUS

45 Tokyo 2013 guidleines Charcot triad TK13 Sensitivity 26% 92% Specificity 96% 78%

46 Management Antibiotics after blood cultures Fluid resuscitation and electrolyte correction Poor penetration into bile duct due to high intra-biliary pressures Correction of coagulopathy Biliary drainage vital. Can occur naturally or by intervention

47 Management Intervention decide on timing severe or moderate. Endoscopic Percutaneous (PTC) Advanced EUS techniques Open Surgery (T-tube drainage + later definitive care)

49 ERCP Superior to surgical drainage Mortality of ERCP vs surgical drainage 10% vs 32% in RCT NEJM 1992 Preferable to PTC Morbidity less, especially in presence of ascites and coagulopathy Arch Surg 197, AmJGastro 1998

50 Management PTC More accessible for an unstable patient May be available when ERCP isn t No RCT comparing ERCP vs PTC Higher M&M Useful for higher (hilar obstructions)

51 Conclusion High Index of suspicion Tokyo 13 guidelines Antibiotics May not be effective Close observation of mild cholangitis can become severe within hours Recognise severe cholangitis and arrange biliary drainage. Often < 24 hours. Prompt biliary drainage and modalities

60 Hilar single colorectal metastasis [1]

61 Hilar single colorectal metastasis (2)

Severe necrotizing pancreatitis. ICU Fellowship Training Radboudumc

Severe necrotizing pancreatitis ICU Fellowship Training Radboudumc Acute pancreatitis Patients with acute pancreatitis van Dijk SM. Gut 2017;66:2024-2032 Diagnosis Revised Atlanta classification Abdominal